Little is known about the acoustic characteristics of the listening situations people are encountering. Knowledge about sound levels and signal-to-noise ratios (SNRs) in everyday situations is important in order to design realistic listening tests. Based on the sound material collected by Wagener, Hansen, and Ludvigsen (J Am Acad Audiol, 2008), new analyses of SNRs were performed. In addition to the calculation of absolute SNR values for a number of everyday life environments, a procedure to document the uncertainty of measurement was implemented.
The range of SNRs found in the material was large and the estimation accuracy was generally good, but worsened at negative SNRs. Altogether, the SNRs found in the selected environments of everyday life were mainly positive. It was however impossible to specify one "typical" realistic SNR, and even when the recordings were divided based on the situation, the SNRs within one category varied substantially.
Publications and Presentations
Smeds K, Wolters F, Rung M. (2015) Estimation of signal-to-noise ratios in realistic sound scenarios. J Am Acad Audiol 26: 183-96.
HADF (Hearing Aid Developers Forum) in Oldenburg (Germany), 2013
SPIN (Speech in Noise Workshop) in Vitoria (Spain), 2013
IHCON (International Hearing Aid Research Conference) in Lake Tahoe, California (USA), 2012
TeMA Hörsel (National conference for Audiologists, Engineers and ENT specialists) in Linköping (Sweden), 2012.
ICRA (International Collegium of Rehabilitative Audiology) in Toronto (Canada), 2011.